金属网增强混凝土抗冲击性能的试验研究与数值模拟

doi:10.11896/cldb.19100105

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Abstract In this work, the split Hopkinson pressure bar (SHPB) impact tests of plain concrete and concrete reinforced with metal meshes were carried out. It was found that adding metal meshes into plain concrete could improve its impact resistance performance. In addition, the effects of strain rate and parameters of metal meshes on the dynamic mechanical properties of specimens were analyzed under different working conditions. The results show that two types of materials both exhibit strain rate hardening effect. Increasing the volume fraction of metal meshes appropriately can further improve the impact resistance performance of specimens. In this test, when the wire diameter is 2 mm, the hole diameter is 12 mm and the layer of metal meshes is 2, the peak stress of the specimen is larger and the impact resistance performance is better. The peak stress of the specimen under 0.30 MPa, 0.45 MPa and 0.55 MPa is 61.2%, 55.2% and 49.7% higher than that of the plain concrete specimen under the same load. Finally, the finite element analysis software LS-DYNA was used to simulate the test, observe the whole destruction process of the specimen, and analyze the propagation law of the stress wave. This research can provide a technical reference for the promotion and application of concrete reinforced with metal meshes in protective engineering.

Key words： concrete reinforced with metal meshes split Hopkinson pressure bar strain rate impact resistance

Published: 06 November 2020

CLC number:

TU513

Fund:Chongqing University Excellent Achievement Transformation Funding Project (KJZH17138), Science and Technology Research Project of Chongqing Education Commission (KJZD-K 201912902).

About author:: Shou Chen, male, is currently a doctoral student majoring in civil engineering in the department of military facilities, Army Logistics University of PLA. He is mainly engaged in the study of impact and penetration resis-tance of new type of shelter.
Shaoqing Shi, male, professor of Army Logistics University of PLA, doctoral supervisor, national millions of talented persons, young and middle-aged experts with outstanding contributions from the state, top-notch personnel in high-level disciplines of the army, enjoys special government allowances. He is mainly engaged in the teaching and scientific research of disaster prevention and reduction engineering and protection enginee-ring. He is responsible for more than 10 national scie-nce and technology support projects, national natural fund and military key scientific research projects. In the past five years, he has published more than 30 academic papers, more than 10 papers included in SCI (EI). Fifteen graduate students have been trained including seven doctoral students and six master students. He has won one second prize for national scientific and technological progress, two first prize for military scientific and technolo-gical progress, five second prize for military scientific and technological progress, and one second prize for Chongqing Natural Science Award.

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	CHEN Shou
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Cite this article:

CHEN Shou,SHI Shaoqing,HE Qiulin, et al. Experimental Study and Numerical Simulation on the Impact Resistance Performance of Concrete Reinforced with Metal Meshes[J]. Materials Reports, 2020, 34(20): 20046-20052.

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http://www.mater-rep.com/EN/10.11896/cldb.19100105 OR http://www.mater-rep.com/EN/Y2020/V34/I20/20046

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